Kovics



3 Sheets-Sheet 1.

M. D. CZVETKOVIGS.

(No Model.)

WEIR.

No. 441,470. Patented Nov. 25, 1890.

Inventor n eases.-

3 sheetssheet' 2.

(No Model.)

M. D. OZVETKOVIOS.

WEIR.

No. 441,470. Patented Npv. 25,1890.

1 Inveniar.

m: mums PETERS coy, FH010-L|THO., WASHINGTON, n. c.

(No Model.) 3 sheets--Sheet 3.

M. D. OZVETKOVIGS. WEIR.

No. 441,470. Patented Nov. 25, 1890..

Wiin ess'es:

In venfior adapted to be automatically turned down at- .high water.

FFICE.

ATENT MI'IAR DEMETER OZVETKOVICS, OF VIENNA, AUSTRIA-HUNGARY.

WEIR.

SPECIFICATION forming part of Letters Patent No. 441,470, dated November25, 1890.

Application filed April 14, 1890- Serial No. 347,837. (No model.)

To aZZ whom it may concern:

Be it known that I, MITAR DEMETER CzvET- KOVICS, a subject of theEmperor of Austria- Hungary, and a resident of the city of Vienna, inAustria-Hungary, have invented certain new and useful Improvements inVVeirs, of which the followingis a specification.

This invention relates to a weir which is Figure 1 is a sectional viewof a weir according to this invention, showing the weirin its uprightposition. Fig. 2 is a similar view showing the weir turned down. Figs. 3and I are views similar to Figs. 1 and 2, respectively, showingamodified construction of weir. Figs. 5, 6, 7, and 8 are sectionalelevations showing the different positions the weir takes.

Figs. 9 and 10 are respectively a front elevation and a plan view of asectional dam constructed of my weirs.

The bodyA of this weiris composed of longitudinal beams and transverseribs, and is connected by means of a rod D with a sill E,

.let into the bed of a stream. Its lower edge bears either against asill Gin the bed of the stream'or is held by a chain attached to thesill E. The height of the pointA where the said rod D and the bodyA ofthe weir are connected is below the center or balancing-point of theweir, such that under normal conditions the point of application of theresultant of the water-pressure exertedupontheweirwillbebelow theaforesaid point A and the water-pressure will hold the weir upright;.but as soon as, in consequence of high water, the point of applicationof the resultant of the pressure exerted upon the weir passes above thesaid point A the weir will turn down to the position shown in Fig. 2, inwhich it will permit the high water to flow oif unobstructed. Asdifficulties are experienced in putting the weir thus turned down in anupright position again, it is expedient to construct the weir asrepresented in Figs. 3 to '7. In this case the body of the weircomprises a lower part A, the upper edge of which is connected by rods Dwith a sill E, let into the bed of the stream,

' and an upper part, whichis pivoted to the upparts A, B, and Carerendered water-tight in any suitable manner.

As the two portions 13 and O of the upper part and also the lower partof the weir can only turn in the opposite direction to that of thepressure of the column of water, the latter will under normal conditionshold the weir upright; but as soon as the level of the water has risento such an extent that the point of application of the pressure exertedupon the surface of the weir passes above the upper edge of the lowerpart Athat is to say, above the point A where the weir is connected withthe above-mentioned rod D'the entire weir will be turned down by I weirat the lower side, thereby lifting the whole weir to the position shownin Fig. 6. The hingi'ng of the partCfacilitates the raising of the weirby allowing a larger opening through which the water passes.

To the upper part B of the weir is pivoted a rod H, the free end ofwhich bears upon the bed of the stream, while its upper end supports theupper portion 'of B, as indicated in Fig. 6,thus preventing the turningof the upper part of the weir in the wrong direction. In the lifting ofthe weir the lower part A of the same passes to such a position that itslower edge will be displaced by the pressure of the water until itstrikes against the abovementioned sill, or until the chain F isstretched and the lowerpart A,is vertical. The aforesaid rod II will inthis .case bear against the lower part of the weir, and the upper partof the latter, passing through the horizontal position, Fig. 7, willtake up the position represented in Fig. 3. In. this arrangement theweir will be automatically turned down if the water rises above theheight, which is deemed admissible, and will be raised automatically orwith very little aid if the normal conditions of the,water are restored;but the height of the column of water would not be constant in the caseof a mean or low water level, but, assuming the sectional area of thespace for the passage of the water to be always the same, would dependupon the level of the water in case this flap-weir did not operate as anoverfall-weir. For this reason the weir, in cases where great importanceis attached to the constancy of the height of the water column, isconstructed so as to constitute an overfall-weir, and the point of theconnection between the lower part Act the weir and the above-mentionedrod D is placed at such a height that the hydrostatic pressure caneffect the turning down of the weir only when a predetermined maximumheight has been reached. A stop I on the back of the upper part of theweir holds up the said rods H when the weir is raised, Fig.

In cases where it may not be practicable to construct the weir as anoverfall-weir a constant height of the column of water can be obtainedby providing a bevel K at the lower edge of the weir and placing theweir in an oblique position, as shown in Fig. 8. The pressure of thecolumn of water then tends to raise the weir proportionately to thelevel of the water, and thus increase the sectional area of the spacefor the passage of the excess of water which runs off below the weir, sothat the height of the column of water will remain constant. To preventthe weir being raised too high, use is made of a protectingrack N, whichalso retains any material which may have been carried away, or the loweredge of the lower part A is connected by a small chain It with the bedof the stream. Under these circumstances the weir when the aftlux ofwater is too great is automatically turned down, and also subsequentlyraised, in the manner hereinbefore described. For regulating theinclination of the flap-weir the above-mentioned chain F can beshortened or lengthened by means of an adjusting-screw L. On the outsideof the upper part of the weir can be arranged a bar M or the like forenabling the person in charge to pass to any part of the weir.

For broad beds of streams two or more inwill cause the body to turnover, substantially as and for the purposes set forth.

2. A weir having a body composed of three parts hinged together,substantially as described, a chain connecting the lower end of the saidbody to the bed of the stream, and a rod or rods connected at one end tothe bed of the stream and at the other end pivoted to the said body at apoint below the center,

whereby a surplus of water will cause the body to turn over,substantially as and for the purposes set forth.

3. A weir having a body the lower edge of which is beveled, a chainconnecting the lower end of the body to the bed of the stream,

means for adjusting the length of the chain,

and arod or rods connected at one end to the bed of the stream and atthe other end pivoted to the said body at a point below the center,whereby a surplus of water will cause the body to turn over,substantially as and for the purposes set forth.

4. A weir having a body, a chain connecting the lower end of the saidbody to the bed of the stream, a rod or rods connected at one end to thebed of the stream and at the other end to the said body at a point belowthe center, the said body having its lower edge beveled and beingadapted to rise, and means, substantially as described, for preventingtoo great a rise of the body, substantially as and for the purposes setforth.

In testimony whereof I have aflixed mysignature in presence of twowitnesses.

MITAR DEME'IER OZVE'IKOVIGS. Witnesses:

'l. G. HARDY, E. G. J. MOELLER.

